背景
Linux下解析main函数参数,使用getopt
,依赖头文件:#include <unistd.h>
。
代码如下:
static char g_deviceid[32] = {0};
std::string g_serverIP = "172.18.18.18";
static int g_serverPort = 8888;
void PrintHelp(char* prog)
{
printf("%s usage.\n", prog);
printf("eg:\n");
printf("%s -i 172.18.18.18 -p 8888 -s 123456789\n", prog);
printf("-i: ip address, default: 172.18.18.18\n");
printf("-p: port number, default: 8888\n");
printf("-s: serial number, default: 123456789\n");
}
void ParseArg(int argc, char *argv[])
{
int ch = 0;
strcpy(g_deviceid, "123456789");
if (argc == 2)
{
if (!strcmp(argv[1], "?") ||
!strcmp(argv[1], "--help") ||
!strcmp(argv[1], "-h"))
{
PrintHelp(argv[0]);
exit(0);
}
}
while ((ch = getopt(argc, argv, "i:p:s:")) != -1)
{
switch (ch)
{
case 'i':
g_serverIP = optarg;
break;
case 'p':
g_serverPort = atoi(optarg);
break;
case 's':
memcpy(g_deviceid, optarg, 32);
break;
case '?':
default:
PrintHelp(argv[0]);
exit(0);
break;
}
}
}
李迟 2018.7.25 中午